httpd: add /api/claim-urls endpoint

httpd.py

@@ -80,6 +80,11 @@ _master_key = None  # master key for worker registration
 _claim_timeout = 300  # seconds before unclaimed work is released
 _workers_file = 'data/workers.json'  # persistent storage
 
+# URL claim tracking (parallel to proxy claims)
+_url_claims = {}               # url -> {worker_id, claimed_at}
+_url_claims_lock = threading.Lock()
+_url_claim_timeout = 600       # 10 min (URLs take longer to fetch+extract)
+
 # Test rate tracking: worker_id -> list of (timestamp, count) tuples
 _worker_test_history = {}
 _worker_test_history_lock = threading.Lock()
@@ -425,6 +430,79 @@ def claim_work(db, worker_id, count=100):
 
     return claimed
 
+def claim_urls(url_db, worker_id, count=5):
+    """Claim a batch of URLs for worker-driven fetching. Returns list of URL dicts."""
+    now = time.time()
+    now_int = int(now)
+
+    # Import here to avoid circular dependency at module level
+    try:
+        from fetch import detect_proto_from_path
+    except ImportError:
+        detect_proto_from_path = None
+
+    # Clean expired URL claims
+    with _url_claims_lock:
+        stale = [k for k, v in _url_claims.items() if now - v['claimed_at'] > _url_claim_timeout]
+        for k in stale:
+            del _url_claims[k]
+        claimed_urls = set(_url_claims.keys())
+
+    # Reuse the same scheduling formula as ppf.py main loop (line 800-805):
+    # WHERE error < max_fail
+    #   AND (check_time + checktime + ((error + stale_count) * perfail_checktime) < now)
+    #   AND (added > min_added OR proxies_added > 0)
+    # Use defaults matching config.ppf: checktime=3600, perfail_checktime=3600, max_fail=10
+    # list_max_age_days=30
+    checktime = 3600
+    perfail_checktime = 3600
+    max_fail = 10
+    list_max_age_seconds = 30 * 86400
+    min_added = now_int - list_max_age_seconds
+
+    try:
+        rows = url_db.execute(
+            '''SELECT url, content_hash, check_time, error, stale_count,
+                      retrievals, proxies_added
+               FROM uris
+               WHERE error < ?
+                 AND (check_time + ? + ((error + stale_count) * ?) < ?)
+                 AND (added > ? OR proxies_added > 0)
+               ORDER BY RANDOM()
+               LIMIT ?''',
+            (max_fail, checktime, perfail_checktime, now_int, min_added, count * 3)
+        ).fetchall()
+    except Exception as e:
+        _log('claim_urls query error: %s' % e, 'error')
+        return []
+
+    # Filter out already-claimed URLs and lock new claims
+    claimed = []
+    with _url_claims_lock:
+        for row in rows:
+            url = row[0]
+            if url in _url_claims or url in claimed_urls:
+                continue
+            _url_claims[url] = {'worker_id': worker_id, 'claimed_at': now}
+
+            proto_hint = None
+            if detect_proto_from_path:
+                proto_hint = detect_proto_from_path(url)
+
+            claimed.append({
+                'url': url,
+                'last_hash': row[1],
+                'proto_hint': proto_hint,
+            })
+            if len(claimed) >= count:
+                break
+
+    if claimed:
+        _log('claim_urls: %d URLs to %s' % (len(claimed), worker_id[:8]), 'info')
+
+    return claimed
+
+
 _last_workers_save = 0
 
 def submit_results(db, worker_id, results):
@@ -1625,6 +1703,29 @@ class ProxyAPIServer(threading.Thread):
                 _log('api/workers error: %s' % e, 'warn')
                 return json.dumps({'error': str(e)}), 'application/json', 500
 
+        elif path == '/api/claim-urls':
+            # Worker claims batch of URLs for fetching (GET)
+            key = query_params.get('key', '')
+            if not validate_worker_key(key):
+                return json.dumps({'error': 'invalid worker key'}), 'application/json', 403
+            worker_id, _ = get_worker_by_key(key)
+            if not worker_id:
+                return json.dumps({'error': 'worker not found'}), 'application/json', 404
+            if not self.url_database:
+                return json.dumps({'error': 'url database not configured'}), 'application/json', 500
+            count = min(int(query_params.get('count', 5)), 20)
+            try:
+                url_db = mysqlite.mysqlite(self.url_database, str)
+                urls = claim_urls(url_db, worker_id, count)
+                update_worker_heartbeat(worker_id)
+                return json.dumps({
+                    'worker_id': worker_id,
+                    'count': len(urls),
+                    'urls': urls,
+                }), 'application/json', 200
+            except Exception as e:
+                return json.dumps({'error': str(e)}), 'application/json', 500
+
         else:
             return json.dumps({'error': 'not found'}), 'application/json', 404